
.ydimg{
    width: 100%;
    height: 100%;
    position: absolute;
}
.pic1{
    background: url("../img/yd1_sj.png");
    background-size: 100% 100%;
}
.pic2{
    background: url("../img/yd2_sj.png");
    background-size: 100% 100%;
}
.pic3{
    background: url("../img/yd3_sj.png");
    background-size: 100% 100%;
}
.step1{
    width:3.85rem;
    height:1.19rem;
    position: absolute;
    left: 4.6rem;
    top: 6.5rem;
    z-index: 10;
}
.step2{
    width:3.85rem;
    height:1.19rem;
    position: absolute;
    left: 3.5rem;
    bottom: 6rem;
    z-index: 10;
    display: none;
}
.step3{
    width:3.85rem;
    height:1.19rem;
    position: absolute;
    left: 4.6rem;
    top: 6.5rem;
    z-index: 10;
    display: none;
}
